Step 1

Pre-heat oven to 350F/175C. Melt 2 tablespoons butter in a large pan over medium heat.

Step 2

Stir in flour until smooth.

Step 3

Add and mix in the salt, sugar, onion, and sour cream.

Step 4

Add the green beans.

Step 5

Stir to coat well.

Step 6

Transfer the mixture to a 2 1/2 quart casserole dish.

Step 7

Spread shredded cheese over the top.

Step 8

In a small bowl, toss together cracker crumbs and the 1 tbsp melted butter.

Step 9

Sprinkle this over the cheese.

Step 10

Bake for 30-35 minutes or until golden brown and cheese is bubbly.